402464 has 12 divisors (see below), whose sum is σ = 792414. Its totient is φ = 201216.

The previous prime is 402443. The next prime is 402487. The reversal of 402464 is 464204.

It can be written as a sum of positive squares in only one way, i.e., 258064 + 144400 = 508^2 + 380^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257 + ... + 6320.

2⁴⁰²⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

402464 is a deficient number, since it is larger than the sum of its proper divisors (389950).

402464 is a wasteful number, since it uses less digits than its factorization.

402464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12587 (or 12579 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402464 is about 634.4005044134. The cubic root of 402464 is about 73.8316112745.

Adding to 402464 its reverse (464204), we get a palindrome (866668).

The spelling of 402464 in words is "four hundred two thousand, four hundred sixty-four".